Efecto del tipo productivo y nivel de proteína de la ración sobre el ritmo fraccional de síntesis proteica en cerdos en crecimiento

Authors:

Sarri L., Seradj A.R., Tor M., De la Fuente G., Balcells J.

Publication date:

7 May 2019

Full title:

Efecto del tipo productivo y nivel de proteína de la ración sobre el ritmo fraccional de síntesis proteica en cerdos en crecimiento

Effect of the productive type and level of protein of the ration on fractional protein synthesis rate in growing pigs

Publishing information:

XVIII Jornadas sobre producción animal, 7-8 May 2019, Campus de Aula Dei, Zaragoza, Spain

Abstract:

The general scope of the present assay is to analyse the effect of productive variety and dietary protein supply on protein metabolism, and further to improve precision feeding and productive efficiency. To this end, a 2 x 2 factorial design trial was conducted with 16 pigs of two different varieties, castrated Duroc and entire (F2) between 25 and 30 kg BW, fed with two diets with different crude protein content, 17% (normal level-NP) and 15% (low level-LP). 24 h before infusion, animals were catheterized in their external right jugular vein and fractional synthesis rate (FSR) was analysed using a flooding dose of phenylalanine (15% as [2H5]-phenylalanine). Natural enrichment of phenylalanine was determined before infusion and blood samples were taken from 12 to 40 min after the start of the infusion, then samples from longissimus dorsi muscle and liver were obtained. The FSR was higher in liver than in longissimus dorsi (61.17 ± 3.279 vs. 15.95 ± 1.128) but differences were neither detected between productive varieties nor between protein supply.

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